button.c

   1 /*
   2  * button.c - button managing
   3  *
   4  * Copyright © 2007-2009 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include "button.h"
  23 #include "luaa.h"
  24 #include "key.h"
  25 #include "common/luaobject.h"
  26
  27 /** Create a new mouse button bindings.
  28  * \param L The Lua VM state.
  29  * \return The number of elements pushed on stack.
  30  */
  31 static int
  32 luaA_button_new(lua_State *L)
  33 {
  34     xcb_button_t xbutton;
  35     button_t *button;
  36
  37     /* compat code */
  38     if(lua_istable(L, 2) && lua_isnumber(L, 3))
  39     {
  40         luaA_deprecate(L, "new syntax");
  41
  42         lua_settop(L, 5);
  43
  44         luaA_checktable(L, 2);
  45         /* arg 3 is mouse button */
  46         xbutton = luaL_checknumber(L, 3);
  47
  48         /* arg 4 and 5 are callback functions, check they are functions... */
  49         if(!lua_isnil(L, 4))
  50             luaA_checkfunction(L, 4);
  51         if(!lua_isnil(L, 5))
  52             luaA_checkfunction(L, 5);
  53
  54         button = button_new(L);
  55         button->button = xbutton;
  56         button->modifiers = luaA_tomodifiers(L, 2);
  57
  58         if(!lua_isnil(L, 4))
  59         {
  60             lua_pushvalue(L, 4);
  61             luaA_object_add_signal(L, -2, "press", -1);
  62         }
  63
  64         if(!lua_isnil(L, 5))
  65         {
  66             lua_pushvalue(L, 5);
  67             luaA_object_add_signal(L, -2, "release", -1);
  68         }
  69
  70         return 1;
  71     }
  72
  73     return luaA_class_new(L, &button_class);
  74 }
  75
  76 /** Set a button array with a Lua table.
  77  * \param L The Lua VM state.
  78  * \param oidx The index of the object to store items into.
  79  * \param idx The index of the Lua table.
  80  * \param buttons The array button to fill.
  81  */
  82 void
  83 luaA_button_array_set(lua_State *L, int oidx, int idx, button_array_t *buttons)
  84 {
  85     luaA_checktable(L, idx);
  86
  87     foreach(button, *buttons)
  88         luaA_object_unref_item(L, oidx, *button);
  89
  90     button_array_wipe(buttons);
  91     button_array_init(buttons);
  92
  93     lua_pushnil(L);
  94     while(lua_next(L, idx))
  95         if(luaA_toudata(L, -1, &button_class))
  96             button_array_append(buttons, luaA_object_ref_item(L, oidx, -1));
  97         else
  98             lua_pop(L, 1);
  99 }
 100
 101 /** Push an array of button as an Lua table onto the stack.
 102  * \param L The Lua VM state.
 103  * \param oidx The index of the object to get items from.
 104  * \param buttons The button array to push.
 105  * \return The number of elements pushed on stack.
 106  */
 107 int
 108 luaA_button_array_get(lua_State *L, int oidx, button_array_t *buttons)
 109 {
 110     lua_createtable(L, buttons->len, 0);
 111     for(int i = 0; i < buttons->len; i++)
 112     {
 113         luaA_object_push_item(L, oidx, buttons->tab[i]);
 114         lua_rawseti(L, -2, i + 1);
 115     }
 116     return 1;
 117 }
 118
 119 LUA_OBJECT_EXPORT_PROPERTY(button, button_t, button, lua_pushnumber);
 120 LUA_OBJECT_EXPORT_PROPERTY(button, button_t, modifiers, luaA_pushmodifiers);
 121
 122 static int
 123 luaA_button_set_modifiers(lua_State *L, button_t *b)
 124 {
 125     b->modifiers = luaA_tomodifiers(L, -1);
 126     luaA_object_emit_signal(L, -3, "property::modifiers", 0);
 127     return 0;
 128 }
 129
 130 static int
 131 luaA_button_set_button(lua_State *L, button_t *b)
 132 {
 133     b->button = luaL_checknumber(L, -1);
 134     luaA_object_emit_signal(L, -3, "property::button", 0);
 135     return 0;
 136 }
 137
 138 void
 139 button_class_setup(lua_State *L)
 140 {
 141     static const struct luaL_reg button_methods[] =
 142     {
 143         LUA_CLASS_METHODS(button)
 144         { "__call", luaA_button_new },
 145         { NULL, NULL }
 146     };
 147
 148     static const struct luaL_reg button_meta[] =
 149     {
 150         LUA_OBJECT_META(button)
 151         LUA_CLASS_META
 152         { "__gc", luaA_object_gc },
 153         { NULL, NULL }
 154     };
 155
 156     luaA_class_setup(L, &button_class, "button", (lua_class_allocator_t) button_new,
 157                      luaA_class_index_miss_property, luaA_class_newindex_miss_property,
 158                      button_methods, button_meta);
 159     luaA_class_add_property(&button_class, A_TK_BUTTON,
 160                             (lua_class_propfunc_t) luaA_button_set_button,
 161                             (lua_class_propfunc_t) luaA_button_get_button,
 162                             (lua_class_propfunc_t) luaA_button_set_button);
 163     luaA_class_add_property(&button_class, A_TK_MODIFIERS,
 164                             (lua_class_propfunc_t) luaA_button_set_modifiers,
 165                             (lua_class_propfunc_t) luaA_button_get_modifiers,
 166                             (lua_class_propfunc_t) luaA_button_set_modifiers);
 167 }
 168
 169 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80